summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/c80.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/drivers/c80.c')
-rw-r--r--src/mame/drivers/c80.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/src/mame/drivers/c80.c b/src/mame/drivers/c80.c
new file mode 100644
index 00000000000..4af7ab0c6db
--- /dev/null
+++ b/src/mame/drivers/c80.c
@@ -0,0 +1,293 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/***************************************************************************
+
+C-80
+
+Pasting:
+ 0-F : as is
+ + (inc) : ^
+ - (dec) : V
+ M : -
+ GO : X
+
+Test Paste:
+ -800^11^22^33^44^55^66^77^88^99^-800
+ Now press up-arrow to confirm the data has been entered.
+
+Commands:
+ R : REGister
+ M : MEMory manipulation
+ G : GO
+ F10 : RESet
+ ESC : BRK
+
+Functions (press F1 then the indicated number):
+ 0 : FILL
+ 1 : SAVE
+ 2 : LOAD
+ 3 : LOADP
+ 4 : MOVE
+ 5 : IN
+ 6 : OUT
+
+When REG is chosen, use UP to scroll through the list of regs,
+or press 0 thru C to choose one directly:
+ 0 : SP
+ 1 : PC
+ 2 : AF
+ 3 : BC
+ 4 : DE
+ 5 : HL
+ 6 : AF'
+ 7 : BC'
+ 8 : DE'
+ 9 : HL'
+ A : IFF
+ B : IX
+ C : IY
+
+When MEM is chosen, enter the address, press UP, enter data, press UP, enter
+data of next byte, and so on.
+
+****************************************************************************/
+
+#include "includes/c80.h"
+#include "sound/wave.h"
+#include "c80.lh"
+
+/* Memory Maps */
+
+static ADDRESS_MAP_START( c80_mem, AS_PROGRAM, 8, c80_state )
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE(0x0000, 0x07ff) AM_ROM
+ AM_RANGE(0x0800, 0x0bff) AM_MIRROR(0x400) AM_RAM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START( c80_io, AS_IO, 8, c80_state )
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE(0x7c, 0x7f) AM_DEVREADWRITE(Z80PIO2_TAG, z80pio_device, read, write)
+ AM_RANGE(0xbc, 0xbf) AM_DEVREADWRITE(Z80PIO1_TAG, z80pio_device, read, write)
+ADDRESS_MAP_END
+
+/* Input Ports */
+
+INPUT_CHANGED_MEMBER( c80_state::trigger_reset )
+{
+ m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+INPUT_CHANGED_MEMBER( c80_state::trigger_nmi )
+{
+ m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
+}
+
+static INPUT_PORTS_START( c80 )
+ PORT_START("ROW0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FCN") PORT_CODE(KEYCODE_F1)
+
+ PORT_START("ROW1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+
+ PORT_START("ROW2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MEM") PORT_CODE(KEYCODE_M) PORT_CHAR('-')
+
+ PORT_START("SPECIAL")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RES") PORT_CODE(KEYCODE_F10) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_reset, 0)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BRK") PORT_CODE(KEYCODE_ESC) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_nmi, 0)
+INPUT_PORTS_END
+
+/* Z80-PIO Interface */
+
+READ8_MEMBER( c80_state::pio1_pa_r )
+{
+ /*
+
+ bit description
+
+ PA0 keyboard row 0 input
+ PA1 keyboard row 1 input
+ PA2 keyboard row 2 input
+ PA3
+ PA4 _BSTB input
+ PA5 display enable output (0=enabled, 1=disabled)
+ PA6 tape output
+ PA7 tape input
+
+ */
+
+ UINT8 data = !m_pio1_brdy << 4 | 0x07;
+
+ int i;
+
+ for (i = 0; i < 8; i++)
+ {
+ if (!BIT(m_keylatch, i))
+ {
+ if (!BIT(m_row0->read(), i)) data &= ~0x01;
+ if (!BIT(m_row1->read(), i)) data &= ~0x02;
+ if (!BIT(m_row2->read(), i)) data &= ~0x04;
+ }
+ }
+
+ data |= (m_cassette->input() < +0.0) << 7;
+
+ return data;
+}
+
+WRITE8_MEMBER( c80_state::pio1_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0 keyboard row 0 input
+ PA1 keyboard row 1 input
+ PA2 keyboard row 2 input
+ PA3
+ PA4 _BSTB input
+ PA5 display enable output (0=enabled, 1=disabled)
+ PA6 tape output
+ PA7 tape input
+
+ */
+
+ m_pio1_a5 = BIT(data, 5);
+
+ if (!BIT(data, 5))
+ {
+ m_digit = 0;
+ }
+
+ m_cassette->output(BIT(data, 6) ? +1.0 : -1.0);
+}
+
+WRITE8_MEMBER( c80_state::pio1_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0 VQD30 segment A
+ PB1 VQD30 segment B
+ PB2 VQD30 segment C
+ PB3 VQD30 segment D
+ PB4 VQD30 segment E
+ PB5 VQD30 segment F
+ PB6 VQD30 segment G
+ PB7 VQD30 segment P
+
+ */
+
+ if (!m_pio1_a5)
+ {
+ output_set_digit_value(m_digit, data);
+ }
+
+ m_keylatch = data;
+}
+
+WRITE_LINE_MEMBER( c80_state::pio1_brdy_w )
+{
+ m_pio1_brdy = state;
+
+ if (state)
+ {
+ if (!m_pio1_a5)
+ {
+ m_digit++;
+ }
+
+ m_pio1->strobe_b(1);
+ m_pio1->strobe_b(0);
+ }
+}
+
+/* Z80 Daisy Chain */
+
+static const z80_daisy_config c80_daisy_chain[] =
+{
+ { Z80PIO1_TAG },
+ { Z80PIO2_TAG },
+ { NULL }
+};
+
+/* Machine Initialization */
+
+void c80_state::machine_start()
+{
+ /* register for state saving */
+ save_item(NAME(m_keylatch));
+ save_item(NAME(m_digit));
+ save_item(NAME(m_pio1_a5));
+ save_item(NAME(m_pio1_brdy));
+}
+
+/* Machine Driver */
+
+static MACHINE_CONFIG_START( c80, c80_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD(Z80_TAG, Z80, 2500000) /* U880D */
+ MCFG_CPU_PROGRAM_MAP(c80_mem)
+ MCFG_CPU_IO_MAP(c80_io)
+ MCFG_CPU_CONFIG(c80_daisy_chain)
+
+ /* video hardware */
+ MCFG_DEFAULT_LAYOUT( layout_c80 )
+
+ /* devices */
+ MCFG_DEVICE_ADD(Z80PIO1_TAG, Z80PIO, 2500000)
+ MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
+ MCFG_Z80PIO_IN_PA_CB(READ8(c80_state, pio1_pa_r))
+ MCFG_Z80PIO_OUT_PA_CB(WRITE8(c80_state, pio1_pa_w))
+ MCFG_Z80PIO_OUT_PB_CB(WRITE8(c80_state, pio1_pb_w))
+ MCFG_Z80PIO_OUT_BRDY_CB(WRITELINE(c80_state, pio1_brdy_w))
+
+ MCFG_DEVICE_ADD(Z80PIO2_TAG, Z80PIO, 2500000)
+ MCFG_Z80PIO_OUT_INT_CB(INPUTLINE(Z80_TAG, INPUT_LINE_IRQ0))
+
+ MCFG_CASSETTE_ADD("cassette")
+ MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED )
+
+ MCFG_SPEAKER_STANDARD_MONO("mono")
+ MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)
+
+ /* internal ram */
+ MCFG_RAM_ADD(RAM_TAG)
+ MCFG_RAM_DEFAULT_SIZE("1K")
+MACHINE_CONFIG_END
+
+/* ROMs */
+
+ROM_START( c80 )
+ ROM_REGION( 0x10000, Z80_TAG, 0 )
+ ROM_LOAD( "c80.d3", 0x0000, 0x0400, CRC(ad2b3296) SHA1(14f72cb73a4068b7a5d763cc0e254639c251ce2e) )
+ROM_END
+
+
+/* System Drivers */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
+COMP( 1986, c80, 0, 0, c80, c80, driver_device, 0, "Joachim Czepa", "C-80", MACHINE_SUPPORTS_SAVE )